Publications by authors named "Placide Ngendahayo"

We report the case of a 68-year-old male who was hospitalized for suspicion of endoleak and thrombosis of an aortic endoprosthesis, arising after multiple endovascular interventions during the last few months. During the intervention, amass was discovered, and biopsies were made. The anatomopathology results were in favor of an epithelioid angiosarcoma with atypical expression of CD31 and ERG- and no amplification of c-MYC.

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Maternal uniparental disomy of chromosome 14 (upd(14)mat) is responsible for a Prader-Willi-like syndrome with precocious puberty. Although upd(14) is often hypothesized to result from trisomy rescue mechanism, T14 cell lines are usually not found with postnatal cytogenetic investigations. We report the coexistence of both chromosomal abnormalities in a 15-year-old girl.

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Primary breast amyloidosis is a rare disease and usually occurs as unilateral or bilateral palpable masses. Primary breast amyloidosis presenting solely as microcalcifications is extremely rare. The authors report a case of a 73-year-old woman with persistent suspicious microcalcifications without palpable mass.

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Article Synopsis
  • Juvenile xanthogranuloma is a benign lesion made up mostly of foamy histiocytes and multinucleated Touton-type giant cells, with few mitotic figures.
  • There are two main histologic patterns: the classic foamy form and a nonlipidized form that has more nonfoamy histiocytes and a slightly higher mitotic activity.
  • An unusual case is noted in a 71-year-old man, showing a significantly elevated mitotic index of 22 mitotic figures per 10 high-power fields, which is atypical for this condition.
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Solitary fibrous tumor, initially described in the pleura, is now known to occur in various extrathoracic sites. However, its occurrence in the female genital tract, especially the vagina, is extremely rare. The authors report here a case of a well-circumscribed vaginal spindle cell nodule in a 48-year-old woman with features consistent with solitary fibrous tumor.

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Eight cases of inflammatory myofibroblastic tumours (IMT) of the urinary bladder in dogs are described, including their clinical, imaging, morphological, and histopathological aspects. Old small breed female dogs were more commonly affected. Haematuria was the main clinical sign, often associated with dysuria and crystalluria.

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Syringocystadenoma papilliferum, a hamartoma with mostly sweat gland, but also follicular infundibular elements, is described on the flank and head of two young cats. Clinically, lesions were cutaneous plaques characterized by irregular but sharply demarcated borders and a roughened, hyperpigmented surface. Complete surgical excision in one case was curative.

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Amyloidosis is a group of storage diseases concerning various proteins, classified as a function of the type of protein. Amyloidosis of the bladder is a rare disease (about one hundred cases have been reported over the last thirty years), but the bladder appears to be the most frequent site in the urinary tract. Amyloidosis may be either primary or secondary, isolated or involving multiple organs.

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